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auth_token.c
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auth_token.c
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/**
* Copyright 2015 Comcast Cable Communications Management, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/**
* @file auth_token.c
*
* @description This file is to fetch authorization token during parodus cloud connection.
*
*/
#include <stdio.h>
#include <fcntl.h>
#include "config.h"
#include "connection.h"
#include "auth_token.h"
#include "ParodusInternal.h"
#include <cjwt/cjwt.h>
#include <stdlib.h>
#include <curl/curl.h>
#include <uuid/uuid.h>
#ifdef PARODUS_SECERT_ENABLE
# ifndef BUILD_YOCTO
#include "rdkconfig_generic.h"
#else
#include "rdkconfig.h"
# endif
#endif
#define MAX_BUF_SIZE 256
#define CURL_TIMEOUT_SEC 25L
#define MAX_CURL_RETRY_COUNT 3
/*----------------------------------------------------------------------------*/
/* File Scoped Variables */
/*----------------------------------------------------------------------------*/
void createCurlheader(struct curl_slist *list, struct curl_slist **header_list);
long g_response_code;
/*----------------------------------------------------------------------------*/
/* External Functions */
/*----------------------------------------------------------------------------*/
int getGlobalResponseCode()
{
return g_response_code;
}
#ifdef PARODUS_SECERT_ENABLE
void getConfigPwd(uint8_t **pPasswd, size_t *pPasswdSize)
{
uint8_t *temp=NULL;
size_t tempSize;
int index = -1;
if(rdkconfig_get(&temp, &tempSize, get_parodus_cfg()->ssl_reference_name))
{
ParodusError("Error in getting passcode\n");
return;
}
else
{
if (temp != NULL)
{
index = strcspn(temp, "\t\r\n");
if((index > 0) && (index <= tempSize))
{
temp[index] = '\0';
}
else
{
temp[tempSize] = '\0';
}
if(strcmp(get_parodus_cfg()->ssl_reference_name,"/tmp/.cfgStaticxpki") == 0)
tempSize++;
*pPasswdSize = tempSize;
*pPasswd = malloc(tempSize);
if(*pPasswd != NULL)
{
memcpy(*pPasswd, temp, tempSize);
ParodusInfo("Passcode decoded successfully\n");
}
else
{
ParodusError("Failed to allocate memory for Passcode\n");
}
if (rdkconfig_free(&temp, tempSize) == RDKCONFIG_FAIL)
{
ParodusError("%s, Memory deallocation failed \n",__FUNCTION__);
}
}
else
{
ParodusError("Memory allocation failed in rdkconfig_get\n");
}
}
}
#endif
/*
* @brief Initialize curl object with required options. create newToken using libcurl.
* @param[out] newToken auth token string obtained from JWT curl response
* @param[in] len total token size
* @param[in] r_count Number of curl retries on ipv4 and ipv6 mode during failure
* @return returns 0 if success, otherwise failed to fetch auth token and will be retried.
*/
int requestNewAuthToken(char *newToken, size_t len, int r_count)
{
CURL *curl;
CURLcode res;
CURLcode time_res;
struct curl_slist *list = NULL;
struct curl_slist *headers_list = NULL;
char webpa_interface[64]={'\0'};
double total;
uint8_t *pPasswd=NULL;
size_t pPasswdSize;
struct token_data data;
data.size = 0;
data.data = newToken;
curl = curl_easy_init();
if(curl)
{
data.data[0] = '\0';
createCurlheader(list, &headers_list);
curl_easy_setopt(curl, CURLOPT_URL, get_parodus_cfg()->token_server_url);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, CURL_TIMEOUT_SEC);
parStrncpy(webpa_interface, getWebpaInterface(), sizeof(webpa_interface));
if(webpa_interface !=NULL && strlen(webpa_interface) >0)
{
curl_easy_setopt(curl, CURLOPT_INTERFACE, webpa_interface);
}
/* set callback for writing received data */
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback_fn);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers_list);
/* setting curl resolve option as default mode.
If any failure, retry with v4 first and then v6 mode. */
if(r_count == 1)
{
ParodusInfo("curl Ip resolve option set as V4 mode\n");
curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
}
else if(r_count == 2)
{
ParodusInfo("curl Ip resolve option set as V6 mode\n");
curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6);
}
else
{
ParodusInfo("curl Ip resolve option set as default mode\n");
curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_WHATEVER);
}
#ifdef PARODUS_SECERT_ENABLE
/* Set the SSL engine and SSL certificate type for the CURL request */
if(get_parodus_cfg()->ssl_engine != NULL && strcmp(get_parodus_cfg()->ssl_engine, "NA") != 0)
{
curl_easy_setopt(curl, CURLOPT_SSLENGINE, get_parodus_cfg()->ssl_engine);
}
if(get_parodus_cfg()->ssl_cert_type != NULL)
{
curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, get_parodus_cfg()->ssl_cert_type);
}
if((get_parodus_cfg()->ssl_cert_type != NULL) && (strcmp(get_parodus_cfg()->ssl_cert_type, "P12") == 0))
{
ParodusInfo("Getting passcode for : %s\n",get_parodus_cfg()->client_cert_path);
getConfigPwd(&pPasswd, &pPasswdSize);
if(pPasswd != NULL && pPasswdSize > 0)
{
curl_easy_setopt(curl, CURLOPT_KEYPASSWD, pPasswd);
}
else
{
ParodusError("Failed to get pPasswd for pk12\n");
}
}
#endif
/* set the cert for client authentication */
curl_easy_setopt(curl, CURLOPT_SSLCERT, get_parodus_cfg()->client_cert_path);
curl_easy_setopt(curl, CURLOPT_CAINFO, get_parodus_cfg()->cert_path);
/* disconnect if it is failed to validate server's cert */
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);
/* Perform the request, res will get the return code */
res = curl_easy_perform(curl);
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &g_response_code);
ParodusInfo("themis curl response %d http_code %d\n", res, g_response_code);
time_res = curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &total);
if(time_res == 0)
{
ParodusInfo("curl response Time: %.1f seconds\n", total);
}
curl_slist_free_all(headers_list);
if(res != 0)
{
ParodusError("curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
curl_easy_cleanup(curl);
data.size = 0;
memset (data.data, 0, len);
return -1;
}
else
{
if(getGlobalResponseCode() == 200)
{
ParodusInfo("cURL success\n");
}
else
{
ParodusError("Failed response from auth token server %s\n", data.data);
curl_easy_cleanup(curl);
#ifdef PARODUS_SECERT_ENABLE
if(pPasswd != NULL && pPasswdSize > 0)
{
if (rdkconfig_free(&pPasswd, pPasswdSize) == RDKCONFIG_FAIL)
{
ParodusError("%s, Memory deallocation failed \n",__FUNCTION__);
}
}
#endif
data.size = 0;
memset (data.data, 0, len);
return -1;
}
}
curl_easy_cleanup(curl);
#ifdef PARODUS_SECERT_ENABLE
if(pPasswd != NULL && pPasswdSize > 0)
{
if (rdkconfig_free(&pPasswd, pPasswdSize) == RDKCONFIG_FAIL)
{
ParodusError("%s, Memory deallocation failed \n",__FUNCTION__);
}
}
#endif
}
else
{
ParodusError("curl init failure\n");
data.size = 0;
memset (data.data, 0, len);
return -1;
}
return 0;
}
/*
* @brief Fetches authorization token and update to parodus config.
This will do curl retry in case of any failure till it reaches max curl retry count.
* @param[in] cfg Global parodus config structure to update webpa_auth_token
*/
void getAuthToken(ParodusCfg *cfg)
{
int status = -1;
int retry_count = 0;
memset (cfg->webpa_auth_token, 0, sizeof(cfg->webpa_auth_token));
if( cfg->hw_mac != NULL && strlen(cfg->hw_mac) !=0 )
{
if( cfg->client_cert_path !=NULL && strlen(cfg->client_cert_path) !=0 )
{
while(1)
{
//Fetch new auth token using libcurl
status = requestNewAuthToken(cfg->webpa_auth_token, sizeof(cfg->webpa_auth_token), retry_count);
if(status == 0)
{
ParodusInfo("cfg->webpa_auth_token created successfully\n");
break;
}
else
{
ParodusError("Failed to create new token\n");
retry_count++;
ParodusError("Curl execution is failed, retry attempt: %d\n", retry_count);
}
if(retry_count == MAX_CURL_RETRY_COUNT)
{
ParodusError("Curl retry is reached to max %d attempts, proceeding without token\n", retry_count);
break;
}
}
}
else
{
ParodusError("client_cert_path is NULL, failed to fetch auth token\n");
}
}
else
{
ParodusError("hw_mac is NULL, failed to fetch auth token\n");
}
}
/* @brief callback function for writing libcurl received data
* @param[in] buffer curl delivered data which need to be saved.
* @param[in] size size is always 1
* @param[in] nmemb size of delivered data
* @param[out] data curl response data saved.
*/
#ifndef DEVICE_CAMERA
size_t write_callback_fn(void *buffer, size_t size, size_t nmemb, struct token_data *data)
{
#else
size_t write_callback_fn(void *buffer, size_t size, size_t nmemb, void *datain)
{
struct token_data *data = (struct token_data*) datain;
#endif //DEVICE_CAMERA
ParodusCfg *cfg;
size_t max_data_size = sizeof (cfg->webpa_auth_token);
size_t index = data->size;
size_t n = (size * nmemb);
data->size += n;
if (data->size >= max_data_size) {
ParodusError("Auth token data overruns buffer\n");
data->size = 0;
return 0;
}
memcpy((data->data + index), buffer, n);
data->data[data->size] = '\0';
return n;
}
/* @brief function to generate random uuid.
*/
char* generate_trans_uuid()
{
char *transID = NULL;
uuid_t transaction_Id;
char *trans_id = NULL;
trans_id = (char *)malloc(37);
uuid_generate_random(transaction_Id);
uuid_unparse(transaction_Id, trans_id);
if(trans_id !=NULL)
{
transID = trans_id;
}
return transID;
}
/* @brief function to create curl header contains mac, serial number and uuid.
* @param[in] h the auth headers to populate
* @param[in] list temp curl header list
* @param[out] header_list output curl header list
*/
void createCurlheader(struct curl_slist *list, struct curl_slist **header_list)
{
char buf[MAX_BUF_SIZE];
char *uuid = NULL;
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Mac-Address: %s", get_parodus_cfg()->hw_mac);
ParodusPrint("mac_header formed %s\n", buf);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Serial-Number: %s", get_parodus_cfg()->hw_serial_number);
ParodusPrint("serial_header formed %s\n", buf);
list = curl_slist_append(list, buf);
uuid = generate_trans_uuid();
if(uuid !=NULL) {
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Uuid: %s", uuid);
ParodusInfo("uuid_header formed %s\n", buf);
list = curl_slist_append(list, buf);
free(uuid);
} else {
ParodusError("Failed to generate transaction_uuid\n");
}
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Partner-Id: %s", get_parodus_cfg()->partner_id);
ParodusInfo("partnerid_header formed %s\n", buf);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Hardware-Model: %s", get_parodus_cfg()->hw_model);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Hardware-Manufacturer: %s", get_parodus_cfg()->hw_manufacturer);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Firmware-Name: %s", get_parodus_cfg()->fw_name);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Protocol: %s", get_parodus_cfg()->webpa_protocol);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Interface-Used: %s", getWebpaInterface());
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Last-Reboot-Reason: %s", get_parodus_cfg()->hw_last_reboot_reason);
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Last-Reconnect-Reason: %s", get_global_reconnect_reason());
list = curl_slist_append(list, buf);
snprintf(buf, MAX_BUF_SIZE, "X-Midt-Boot-Retry-Wait: %d", get_parodus_cfg()->boot_retry_wait);
list = curl_slist_append(list, buf);
*header_list = list;
}